Cylinder pump



1 her 2'connected by a cap 35.

Patented Nov. 3, 1931 1 UNITED STA s i IARNOLD nomvnunnusnor BILEEKANSAS -f I Application fi1ed.Apr-il 1,

stroke.

In the drawing,'the invention is shown in a single figure which is a "ertical longitudinal. section. I

The pump forming the subject matter of this'application comprises a cylinder. C ineluding an upper member 1 and a lower mem- The lower end of the lower member. 2 of the cylinder is mounted on a foot 34, an inlet pipe 3 being connected to the foot 34'. The numeral 4 IE designates abarrehlocated within the lower member 2 of the cylinder. .The upper end of the barrel 4 is connected to the cap. 35. Thereis a space 50 between thebarrel 4 and the lower member 2 ofthe cylinder.

cap 35 and in'the upper end of the barrel 4 there are ports 15 communicating with the space 50 and with the upper end of the bar- 'rel 4. Thenumeral 1O designates a hollow piston rodmovable longitudinally in the uppermember l of the cylinderand in the barrel 4. The rod 10 carries a travelling'packing member 14 which slides in the upper member 1 of the cylinder. .The hollow piston rod 10 has ports 16 establishing com- ,munication between theinterior of the rod 10 i and the space between'theupper member 1 I of the cylinder and the hollow rod 10, above the member 14. p

, Numeral 12 marks a bottom piston carrying a packing33 that fits closely inthe barrel 4' The piston 12 has 'in'itslower end a passage 32 which communicates "with the space below the piston 12, in the barrel 4.

' The'piston 12 has ports 6 which communi- 9 cate. with the space below the piston 12 and within the barrel 4. The ports 6 are controlled by a downwardly closing first check 1 valve 7 of annular form. The passage 32 is controlled by a fourth check valve 11- that closes downwardly. I I

The barrel 4 includes a base 31 havinga reduced extension 30 to which is threaded into the top of the foot 34, the extension 30 being of tubular form and establishing communication between the foot 34'and the lower In the 1559, s ri l no. 351,530..

end of the barr'el i. The extension 30 is contr'ol'led'by adowiiwardly closing second check valve 8, thecheck valve 8' working beneath stops-29on the "base 31. In the "top of the foot-34 there; are portsf28 controlled by a downwardly closing third check valve 9, the check valve 9 having fingers '27 located in the P' '2 t On the down stroke of the piston rod 10, the second valve 8 closes; the fourth valve 11 opens; and liquid in'the barrel 4 below the piston 12 'moves through the passage 32 through the piston 12, into'the 'hollow piston r'ddlO, and out of the ports 16 into the space within theupper part 1 ofthefcylinder 0, above the member14. As thebottom'piston 12 moves downwardly, the first check valve 7 closes, and liq'uid is sucked from the space 50 through theports 15 into the space within the barrel 4,- above the bottom piston 12, and the suction thus created in the space 50 causes the third check valve 9 to open and admit liquid into the space 50, through the ports 28, from the foot 34 and the inlet 3. On the upstroke of the piston rod 10, the third check valve 9 is in closed position. The second check valve 8 is in open position, the fourth check valve 11 is in closed position, and the first check valve 7 is opened as the water on top of the piston 12 is forced upwardlythrough the ports 6 into the interior of the piston 12, The bottom piston 12 sucksthe liquid into the space 50 from the base 34 and from the inlet 3 through the I ports 28. Because the fourth check valve 11 is closed, the liquid within the hollow piston 10 is hoisted. The. liquid in the upper part 1 of the cylinder C, above the member 14, is raised also.

What is claimed is A pump including a cylinder having an i outlet in its upper end, a foot for the cylinder and provided with a plurality of ports arranged in annular form in its top, a barrel connected at its upper end to the cylinder, a' base for the barrel and having a reduced tubular extension mounted on the foot, an annular, washer-like check valve disposed about the extension and controlling the ports,

said valve being movable between the foot and the baseof the barrel; said base constituting a stop limiting the upward movement of the valve, means for establishing communication between the upper end of the barrel and the upper end of the cylinder, a hollow piston rod in the outlet of the cylinder and 1n the barrel, a piston carried by the rod and slidable: in.the-vba1;rel',-. the pistorrhawing, up:-

per and lower chambers, the upper chamber 10 being in communication with the hollow pis- I 7 ton rod, and the lower eha mberbeingiin coma; r

munication with the lower part of the barrel,

the upper chamber being of greater diameterthan the lower chamber, whereby ports" can 15 be formed in the lower en'd o'lthe' upper cham her, about thelower' chamber, said ports communicating with: the upper ohamber and with the barrel, above the piston, afdown- V v Wardly-closmg check valve in the lower 2 chamber and controlling backfiow from the 7 lower chamber. into the barrelebelow the piston and a downwardly-closing, annular,-

- Washer-like check valve in the upper ehamber andfoontrollingfthe said ports in the lower V end of the vupperchamber, the last=speoified check, valveibein gg held in place; over the portsinthe lower end-of the second chamber by the side wallfof. said ehamber, the annular 7' "formj'of the lastV-speeified check valve per- 33 mitting liquid to pass through. it from the to the outlet, I W y v In testimony that lolaim. the foregoing as 'my own,\I-have; heretoaffixedmysignature. v .7 3 7 ARNOLD BOHNENBLUST.v 1 V lower ohamber'into the upper chamber and a I I 

